Electric switch.



J. H. RUSBY'.

ELECTRIC SWITCH.

APPLICATION FILED MAYI4 1911.

5] nveutoz Jbse E X21155 Patented June 11, 1918.

Para

nLEcrmc SWITCH.

Specification of Letters Patent.

Patented June 11, 1918.

Original application filed may 22, 1913, Serial No. 769,199; Patent No. 1,228,052, dated May 29, 1917. Divided and this application filed May 14, 1917. Serial No. 168,372.

' To all whom it mayconcem:

Be it known that I, JosEPn RUsBY, a citizen of the. United States, res1ding at Nutley, county of Essex, and State of New Jersey, have invented new. and useful Improvements in Electric Switches, of which the following is a, specification.

' The following invention is a division of my Patent No.- -1,228,052, May 29, 1917 10 The present invention relates to that class of surface type ofelect'ric switch which is the blades into contact devices.

- fication and claims and illustrated in the acessentially operated by push buttons to snap positive engagement with the The invention is designed'to provide means for rotary adjustment, of the switch to position it relative to. the'wall' surface where it is secured. v

The novel features of the invention are more fully described in the following specicompanyingzdrawing in which;

-Figure1 represents a front elevation of a I surface type of electric switch showing the. 25 p I cover removed.

- 'Fig. 2 is a vertical section taken along the line as a: of the same. I I

Fig. 3 is a horizontalsection'taken alon the line y y of the same.

Fig. 4 is a similar section taken along the line 2 z of Fig. 1. 5

Fig. 5 is a rear view of an insulated support. I v

' Fig. 6 is a front eleyation of one of the in sulated supports.

"Fig. 7 is adeta'il side elevation of the blades. v

Fig. 8 is a side'elevation of a make and break mechanism theblades having been removed. v w

Fig. 9 is a detail view of a push button.

Fig. 10 is a perspective view of a modified form of carrier piece. v

Fig. 11 is a detail side view of a cover, and armoring shell.

In this drawing the letter a designates an insulating supporting block preferably formed ofporcelain with an'openl portion 6 and having chambers c, the object of which will be-hereinafterdescribed. The block as shown is constructed of two sections and fitted together.- An armoring shell 01 is ar ranged about the exterior of the block and a plate 52 with holes for a. pair of-push buttons 25 isadapted to cover the front portion of the block. In the interior of the cover and portions of the shell is located a lining 50 of mica or other non-conductin material. The armoring shell is secure to the blocks by means of lugs 51 coacting with refiess? or seats e formed in the face of the The make and break operating'mechanism includes a pairof push buttons 25 having shanks pivoted at 26 to a spring actuating lever piece 27 mounted on a pivot-bolt 28. The said bolt is supported in a frame 29, the front portion of which is adapted-t0 be fastened by means of a screw 30 to the cover.

A lug member 31 is mounted on the pivot bolt 28 and it has connected to it a blade 32. Hard fiber'Or mica 33 insulates the blades from the remainder of the mechanism. A

spring 34 is coiled about a drum 35 and this drum is mounted on a hollow spindle 39 fixed to the lever piece 27 noted above. A latch detent 36 is provided with a lug and it is pivoted at 37 to the supports. ThlS latch is connected at-38 to the shank of one of the push buttons and the lug of the'detent coaots with one efthe other of the edges formed on the rim T'of the blade carrier 31 mentioned above.

The lever piece 27 has a cross arm and the blade carrier 31 has a similar'arm extending between the shanks of the coiled spring. The

The conductorcontacts 40 as shown are,

formed of heavy metal to provide current v capacity and stock for ample binding screw threads, while the blade contact portions 43 may be formed of thin metal of high conductivity such as harddrawn copper and se cured upon the main contact as shown, thus obviating the need of springing the blades open widelywhich excessively wide spring-' ing tends to shorten the life of the blades b 1 1 breaking, or of providing roomfor a thic contact piece in the blade chamber 0.

By co structing the spring drum 35v of drawn s eet metal and mounting it upon the hollow spindle 39 which spindle also carries the lever piece 27, a simplification is effected and a reduction of metal weight, also a ready means of confining the operatingspring by turning back a lug upon the wall of the drum. As indicated in Fig. 4, the pivot bolt 28 has pointed ends bearing against the porcelain sides of the insulated block reventin longitudinal play of the pivot-an designed to form a ivot point with an insignificant degree of friction on the point. It should be said that the same result'can be obtained by having the pivot riveted to the blade and having a projecting point on the porcelain to center the pivot.

By forming the push button shanks with bifurcated ends '45 as shown in Fig. 9 a double support is formed for the rivet pin 26 thus saving switch depth space and adding strength.

As shown in Fig. 1, the means for adjusting the switch consist of screws 46 cotiperating with the concentric slot 47 formed in the insulated block a; The adjusting screw 46 has an angular head with a tapped portion arranged in the slot and a shoulder to bear against the rear portion of the block, a screw 48 is adapted to clamp the screw 46 to the block. By adjusting the screw 48 the switch may be turned around or rotated on the screw heads within the limits of the segmental slots to line the push buttons.

By extending the insulating base a of the switch through the bottom of the armoring shell as shown at 49 and seating the switch upon this insulating base, a space for air insulation is provided between the armoring shell and the wall supportin case the blade insulation breaks down and it also prevents shifting of the insulating base a in the shell.

By turning in the .lugs 51 on the armoring shell top upon the seats 6 in the insulat-' ing base, this base is securelyclamped into the shell, regardless of any additional securing means.

By extending the ends of the flexible shell lining insulation under these turned-in lugs before the lugs are turned, the lugs also secure the flexible insulation 50 into place. The turning in of these lugs on the armoring shell 03 also provides slots for truing a series of lugs f on the cover plate 52, as denoted in Fig. 11, preventing any shifting of cover plate which might bind the push bottom and prevent freedom of action.

The sheet insulation provides separation of the contact piece from the shell.

The frame lugs 29 as indicated in Figs. 1 and 2 for inclosing the push buttons, prevent swing of the metal button shanks over against live metal parts'such as contacts.

The riveting of flexible spring contacts 43 as shown in Fig. 3 upon the conductor contacts 40 economlzes space, and provides positive electrical conductivity.

By forming the blade carrier 31 in two parts, as shown in Figr lO, great strength wearer ing lug is braced to great mechanical stiffness. By bending in the ends of this lug 31 of the blade carrier, they can be formed to clear the blade by ample insulating space, and at the same time form stops againstthe shell bottom. By shouldering the inside pivot 28 upon which these blade carriers 31 and 39 are mounted, with double riveting shoulders, the carrier can be riveted upon the first one and the remaining one may form a securing rivet support for the blade, and a preventive of longitudinal play as noted previously.

It will be readily understood that the switch can be adjusted as to the depthin a wall by means of the devices 46 and 48. In this construction, the screws 46 can coact with a wall box and are run in or out as to the depth required. The necks of the screws 46 are squared to fit the slots 47 as indicated in Fig. 5, so that when the screws 48 are in engagement with the square heads the screws cannot turn. These adjusting screws are adapted to clamp the switch onto a surface or into a wall box as desired. I

I claim: 7 1. An electric switch comprising a metal receptacle, an insulating supporting block seated in said receptacle, said insulating supporting block being extended through the bottom of the said receptacle to form mounting seats for said switch, to retain a separation between said receptacle and a mounting surface, and to assist in securing said insulating block in said receptacle.

2. An electric switch comprising a metal receptacle, an insulating supporting block in said receptacle, said insulating supporting block being provided with seats said recep-- tion in said receptacle.

4. An electric switch comprising'a metal receptacle, an insulating supporting block in said receptacle, said insulating supporting block being provided with seats, said.

receptacle having lugs turned into said seats, slots in said receptacle wall formed by turned in lugs, and a cover plate, said cover plate provided withlugs adapted to seat into said slots for retaining said cover plate circumferentially' fixed.

5. An electric switch comprising a support, contacts and a make and break mechanlsm, said mechanism comprising a vertical supporting frame, a hollowpivot support mounted horizontally upon said frame,

a pivot bolt inside said hollow pivot support, said bolt having a shouldered neck of reduced diameter, a blade carrier secured thereby upon said pivot bolt, and a secondary shouldered" neck of still further reduced diameter, and a blade secured thereby upon the smaller shouldered neck.

6. An electric switch comprising a support, contacts and a make and break mechanism, said mechanism including a vertical supporting frame, a hollow pivot support mounted horizontallyupon said frame, a pivot bolt in said hollow pivot support, a blade and a blade carrier mounted concentrically upon said pivot bolt, said blade carrier comprising two portions, one portion extending vertically, the other portion extending horizontally and supported upon said vertical portion above said pivot support, said vertical portion extending above said supporting junction for supporting said blade.

7 An electric switch comprising a metal receptacle having a base, an insulating supporting block, contacts and a make and break mechanism, said mechanism comprising a supporting frame, said frame mounted upon said receptacle base, and said insulating supporting block mounted in said receptacle independently of said supporting frame.

8. An electric switch comprising a base, contacts and a make and break'mechanism, said mechanism comprising a vertical supporting frame, a lever pivoted upon said frame, push buttons pivoted upon said lever,

said frame having lugs inclosing said push buttons for confinin same horizontally.

9. An electric switch comprising an insulating supporting block,fcontacts, an armoring shell about said block, and a make and break mechanism, said mechanism comprising a vertically extending supporting frame, a blade carrier pivoted upon said frame, said carrier adapted to stop against the base of said armoring shell.

10. An electric switch comprising a receptacle, an insulating supporting block, contacts, and a make and break mechanism,

said block having a concentric securing slot for supporting means, said slot being elongated circumferentially of said switch center for adjustment on said supporting means) p 11. An electric switch comprising an insulating support, a make and break mechanism, .said mechanism comprising a blade, and a conductor contact formed of relatively thick metal, said contact forming a support for a thinner contact adapted to connect with said blade.

12. An electric switch comprising an insulating support, a make and break mechanism, said mechanism comprising a blade, and a contact supported upon said insulating support, said contact having a shoulder, and a spring contact secured upon said contact shoulder, adapted to connect with said blade.

'13. An electric switch comprising a receptacle, an insulating supporting block, contacts, and a make and break mechanism, said block having a concentric securing slot for supporting means, said slot elongated circumferentially of said switch center for adjustment on said supporting means, vsaid supporting means comprising a screw with a shouldered head to seat into said elongated slotagainst rotation, said shouldered head having a tapped hole for securing screw.

14. An electric switch comprising an insulating supporting block, contacts, and a make and break mechanism, said block having a concentric securing aperture for the supporting means, said supporting means including a screw, a shouldered head on said screw to fit into said aperture against rotation, said shouldered head having a tapped hole for the securing screw.

15. An electric switch comprising an insulating supporting block, contacts, and a make and break mechanism, said mechanism comprising a vertical supporting frame, said frame mounted upon said receptacle base, and said insulating supporting block mounted in said receptacle independently of said supporting frame, said frame having a horizontal bend at top and a tapped hole, said switch provided with a cover having a supporting hole, and a supporting screw in said hole, adapted to thread into said tapped hole in said frame to 6. An electric switch comprising a metal receptacle having a base, an insulating supporting block in said receptacle, azdepression in said block, contacts, and a'makeand break mechanism secured u on the base of said receptacle in said mechanism comprising a vertical supporting frame, a tubular pivot support horizontally on said frame, a pivot in said pivot epression, said support, a blade carrier on said pivot and a blade on said carrier, and means whereby said insulating block confines said pivot against longitudinal movement.

In testimony whereof I have hereunto set my hand in the presence of two subscrib- 

